class_docstr: load and select cursors based on the key press
      
docstr: Load the xpm cursors into memory converting to and array of QCursor
          
docstr_tok: ["Load","the","xpm","cursors","into","memory","converting","to","and","array","of","QCursor"]
code: def init_cursors(cls):
      """Load the xpm cursors into memory converting to and array of QCursor"""
      if not cls.cursors_loaded:
          cls.cursors = cls.__load_cursors()
          cls.cursors_loaded = True
  
file_path: nptsne/demos/ExtendedHSNEDemo/cursors.py
imports: from enum import Enum
  from PyQt5.QtGui import QCursor, QPixmap
  from PyQt5.QtCore import Qt
label_desc: Use image node_id 3 for calling the DrawingCursors obj's underlying member method code with example usage: obj.init_cursors(cls) without return types